My ps3 is connected to OPT 1 on my Onkyo. From the OPT 1 menu, i can select whether 2 channel, DTS, 6-channel, Dolby Digital, etc. Make sure you check the input of your receiver to match your settings with your soundcard. No matter what output you define on the soundcard, if the receiver will only decode it to 2-channel. That's the only thing it would do.